Kapselung in Funktionen;

Speicherung der dB-Werte nur, wenn positiv + Kommentare zum Verständnis der zu speichernden Variablen

app/src/main/AndroidManifest.xml

@@ -2,13 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.example.greenwatch">
 
-    <uses-permission android:name="android.permission.INTERNET" />
-    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
-    <uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />
-    <uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
     <uses-permission android:name="android.permission.RECORD_AUDIO" />
-    <uses-permission android:name="android.permission.CAMERA" />
-
     <application
         android:allowBackup="true"
         android:icon="@mipmap/ic_launcher"
@@ -16,6 +10,9 @@
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/Theme.GreenWatch">
+        <activity
+            android:name=".Mikrofon"
+            android:exported="false" />
         <activity
             android:name=".MainActivity"
             android:exported="true">

app/src/main/java/com/example/greenwatch/AlarmRecorder.java

@@ -1,225 +0,0 @@
-package com.example.greenwatch;
-
-import android.graphics.SurfaceTexture;
-import android.media.MediaCodec;
-import android.media.MediaExtractor;
-import android.media.MediaFormat;
-import android.media.MediaMuxer;
-import android.media.MediaRecorder;
-import android.os.Environment;
-import android.view.Surface;
-import android.view.SurfaceHolder;
-
-import java.io.File;
-import java.io.IOException;
-import java.nio.ByteBuffer;
-
-public class AlarmRecorder {
-    private String videoPath;
-    private String audioPath;
-    private MediaFormat videoFormat;
-    private MediaFormat audioFormat;
-    private MediaExtractor videoExtractor;
-    private MediaExtractor audioExtractor;
-    private Runnable audioRecorderRunnable;
-    private Runnable videoRecorderRunnable;
-    private MediaRecorder videoRecorder;
-    private MediaRecorder audioRecorder;
-    //private SurfaceHolder previewHolder;
-    private Surface surface;
-    private Thread videoThread; // Video-Thread als Instanzvariable
-    private Thread audioThread; // Audio-Thread als Instanzvariable
-
-    public AlarmRecorder(SurfaceTexture surfaceTexture) {
-        audioRecorder = new MediaRecorder();
-        videoRecorder = new MediaRecorder();
-        videoExtractor = new MediaExtractor();
-        audioExtractor = new MediaExtractor();
-        this.surface = new Surface(surfaceTexture);
-    }
-
-    public void startRecording() {
-        createStoragePaths(); //Speicherort und -namen für Audio- und Video-Datei
-
-        audioRecorderRunnable = new AudioRecorder(audioRecorder, audioPath);
-        videoRecorderRunnable = new VideoRecorder(videoRecorder, videoPath, surface);
-        audioThread = new Thread(audioRecorderRunnable);
-        videoThread = new Thread(videoRecorderRunnable);
-
-        //Threads starten
-        videoThread.start();
-        audioThread.start();
-    }
-
-    public void stopRecording() {
-        try {
-            stopVideoRecording();
-            stopAudioRecording();
-
-            waitTillThreadsStopped();
-            File videoFile = new File(videoPath); //Speichere das aufgenommene Video
-            File audioFile = new File(audioPath); //Speichere die aufgenommene Audio
-
-            if (videoFile.exists() && audioFile.exists()) {
-                //Wenn Video- und Audioaufzeichnung gestoppt und abgespeichert sind, beginne mit dem Mergeprozess der beiden
-                mergeVideoWithAudio();
-            }
-        } catch (RuntimeException stopException) {
-            stopException.printStackTrace();
-        }
-    }
-
-    private void createStoragePaths(){
-        //Pfade zum Zwischenspeichern der aufgenommenen Audio und Video-Datei
-        String externalStorageDirectory = Environment.getExternalStorageDirectory().getAbsolutePath();
-        String dcimDirectory = externalStorageDirectory + "/DCIM";
-        videoPath = dcimDirectory + "/video.mp4";
-        audioPath = dcimDirectory + "/audio.mp3";
-    }
-
-    private void stopVideoRecording(){
-        if (videoRecorder != null) {
-            videoRecorder.stop();
-            videoRecorder.release();
-            videoRecorder = null;
-        }
-    }
-
-    private void stopAudioRecording(){
-        if (audioRecorder != null) {
-            audioRecorder.stop();
-            audioRecorder.release();
-            audioRecorder = null;
-        }
-    }
-
-    private void waitTillThreadsStopped(){
-        try {
-            videoThread.join();
-            audioThread.join();
-        } catch (InterruptedException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private void mergeVideoWithAudio() {
-        try {
-            setVideoExtractorDataSource(); //extrahieren der Video Datei, die zuvor zwischengespeichert wurde
-            setAudioExtractorDataSource(); //extrahieren der Audio Datei, die zuvor zwischengespeichert wurde
-
-            //Speicherort der später zusammengeführten Datei
-            String outputFilePath = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_MOVIES).getAbsolutePath() + "/merged_video.mp4";
-            //MediaMuxer zum Zusammenführen einer Audio- und einer Videodatei
-            MediaMuxer muxer = new MediaMuxer(outputFilePath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
-            int videoTrack = muxer.addTrack(videoFormat);
-            int audioTrack = muxer.addTrack(audioFormat);
-            muxer.start();
-
-            ByteBuffer buffer = ByteBuffer.allocate(1024 * 1024);
-            MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
-
-            videoExtraction(buffer, videoTrack, bufferInfo, muxer);
-            audioExtraction(buffer, audioTrack, bufferInfo, muxer);
-
-            muxer.stop();
-            muxer.release();
-
-            // Löschen der separaten Video- und Audio-Dateien
-            deleteVideoFile();
-            deleteAudioFile();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-    private void setVideoExtractorDataSource() {
-        try {
-            videoExtractor.setDataSource(videoPath);
-            int videoTrackIndex = getTrackIndex(videoExtractor, "video/");
-            if (videoTrackIndex < 0) {
-                // Video-Track nicht gefunden
-                return;
-            }
-            videoExtractor.selectTrack(videoTrackIndex);
-            videoFormat = videoExtractor.getTrackFormat(videoTrackIndex);
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    private void setAudioExtractorDataSource() {
-        try {
-            audioExtractor.setDataSource(audioPath);
-            int audioTrackIndex = getTrackIndex(audioExtractor, "audio/");
-            if (audioTrackIndex < 0) {
-                // Audio-Track nicht gefunden
-                return;
-            }
-            audioExtractor.selectTrack(audioTrackIndex);
-            audioFormat = audioExtractor.getTrackFormat(audioTrackIndex);
-
-        } catch (IOException e) {
-            throw new RuntimeException(e);
-        }
-    }
-
-    private int getTrackIndex(MediaExtractor extractor, String mimeType) {
-        int trackCount = extractor.getTrackCount();
-        for (int i = 0; i < trackCount; i++) {
-            MediaFormat format = extractor.getTrackFormat(i);
-            String trackMimeType = format.getString(MediaFormat.KEY_MIME);
-            if (trackMimeType.startsWith(mimeType)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-
-    private void videoExtraction(ByteBuffer buffer, int videoTrack, MediaCodec.BufferInfo bufferInfo, MediaMuxer muxer) {
-        videoExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
-        while (true) {
-            int sampleSize = videoExtractor.readSampleData(buffer, 0);
-            if (sampleSize < 0) {
-                break;
-            }
-            long presentationTimeUs = videoExtractor.getSampleTime();
-            bufferInfo.offset = 0;
-            bufferInfo.size = sampleSize;
-            bufferInfo.flags = MediaCodec.BUFFER_FLAG_KEY_FRAME;
-            bufferInfo.presentationTimeUs = presentationTimeUs;
-            muxer.writeSampleData(videoTrack, buffer, bufferInfo);
-            videoExtractor.advance();
-        }
-    }
-
-    private void audioExtraction(ByteBuffer buffer, int audioTrack, MediaCodec.BufferInfo bufferInfo, MediaMuxer muxer) {
-        audioExtractor.seekTo(0, MediaExtractor.SEEK_TO_CLOSEST_SYNC);
-        while (true) {
-            int sampleSize = audioExtractor.readSampleData(buffer, 0);
-            if (sampleSize < 0) {
-                break;
-            }
-            long presentationTimeUs = audioExtractor.getSampleTime();
-            bufferInfo.offset = 0;
-            bufferInfo.size = sampleSize;
-            bufferInfo.flags = 0; // or MediaCodec.BUFFER_FLAG_KEY_FRAME
-            bufferInfo.presentationTimeUs = presentationTimeUs;
-            muxer.writeSampleData(audioTrack, buffer, bufferInfo);
-            audioExtractor.advance();
-        }
-    }
-
-    private void deleteVideoFile(){
-        File videoFile = new File(videoPath);
-        if (videoFile.exists()) {
-            videoFile.delete();
-        }
-    }
-
-    private void deleteAudioFile(){
-        File audioFile = new File(audioPath);
-        if (audioFile.exists()) {
-            audioFile.delete();
-        }
-    }
-}

app/src/main/java/com/example/greenwatch/AudioRecorder.java

@@ -1,30 +0,0 @@
-package com.example.greenwatch;
-
-import android.media.MediaRecorder;
-
-import java.io.IOException;
-
-public class AudioRecorder implements Runnable {
-
-    private final MediaRecorder audioRecorder;
-    private final String audioPath;
-    public AudioRecorder(MediaRecorder audioRecorder, String audioPath) {
-        this.audioRecorder = audioRecorder;
-        this.audioPath = audioPath;
-    }
-    @Override
-    public void run() {
-        audioRecorder.setAudioSource(MediaRecorder.AudioSource.DEFAULT);
-        audioRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
-        audioRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AAC);
-        audioRecorder.setOutputFile(audioPath);
-
-        try {
-            audioRecorder.prepare();
-            audioRecorder.start();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-
-}

app/src/main/java/com/example/greenwatch/Beschleunigungssensor.java

@@ -0,0 +1,4 @@
+package com.example.greenwatch;
+
+public class Beschleunigungssensor {
+}

app/src/main/java/com/example/greenwatch/GleitenderMittelwert.java

@@ -0,0 +1,23 @@
+package com.example.greenwatch;
+
+public class GleitenderMittelwert {
+    private final float wichtungNeuerWert;
+    private final float wichtungAlterWert;
+    private float mittelwert = 0;
+
+    private boolean istMittelwertGesetzt = false;
+
+    GleitenderMittelwert(float wichtungNeuerWert) {
+        this.wichtungNeuerWert = wichtungNeuerWert;
+        this.wichtungAlterWert = 1 - this.wichtungNeuerWert;
+    }
+
+    float mittel(float wert) {
+        if (istMittelwertGesetzt) {
+            mittelwert = wert * wichtungNeuerWert + mittelwert * wichtungAlterWert;
+        } else {
+            mittelwert = wert;
+            istMittelwertGesetzt = true;
+        }
+        return mittelwert;
+}}

app/src/main/java/com/example/greenwatch/Kamera.java

@@ -0,0 +1,4 @@
+package com.example.greenwatch;
+
+public class Kamera {
+}

app/src/main/java/com/example/greenwatch/MainActivity.java

@@ -1,101 +1,25 @@
 package com.example.greenwatch;
 
-import android.Manifest;
-import android.content.pm.PackageManager;
-import android.graphics.SurfaceTexture;
+import androidx.appcompat.app.AppCompatActivity;
+
+import android.content.Intent;
 import android.os.Bundle;
-import android.view.TextureView;
 import android.view.View;
 import android.widget.Button;
-import android.widget.Toast;
 
-import androidx.appcompat.app.AppCompatActivity;
-import androidx.core.app.ActivityCompat;
-import androidx.core.content.ContextCompat;
-
-public class MainActivity extends AppCompatActivity implements TextureView.SurfaceTextureListener{
-
-    private boolean isRecording = false;
-    private static final int REQUEST_PERMISSION = 200;
-    private Button button;
-    private TextureView textureView;
-    private AlarmRecorder alarmRecorder;
+public class MainActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
-        button = findViewById(R.id.button);
-        textureView = findViewById(R.id.textureView);
-        textureView.setSurfaceTextureListener(this);
-
-        button.setOnClickListener(new View.OnClickListener() {
+        ((Button)findViewById(R.id.buttonstartmicdetection)).setOnClickListener(new View.OnClickListener(){
             @Override
-            public void onClick(View v) {
-                if (!isRecording) {
-                    if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.CAMERA)
-                            != PackageManager.PERMISSION_GRANTED
-                            || ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE)
-                            != PackageManager.PERMISSION_GRANTED
-                            || ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.RECORD_AUDIO)
-                            != PackageManager.PERMISSION_GRANTED) {
-                        ActivityCompat.requestPermissions(MainActivity.this,
-                                new String[]{Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.RECORD_AUDIO},
-                                REQUEST_PERMISSION);
-                    } else {
-                        isRecording = true;
-                        alarmRecorder.startRecording();
-                    }
-                } else {
-                    isRecording = false;
-                    alarmRecorder.stopRecording();
-                }
+            public void onClick(View view) {
+                Intent i = new Intent(MainActivity.this, Mikrofon.class);
+                startActivity(i);
             }
         });
     }
-
-    @Override
-    public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
-        alarmRecorder = new AlarmRecorder(surfaceTexture);
-    }
-
-    @Override
-    public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
-        // Die Größe der SurfaceTexture hat sich geändert
-        // Hier können entsprechende Anpassungen vorgenommen werden
-    }
-
-    @Override
-    public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
-        // SurfaceTexture wurde zerstört
-        // Hier können entsprechende Bereinigungen durchgeführt werden
-        return true;
-    }
-
-    @Override
-    public void onSurfaceTextureUpdated(SurfaceTexture surface) {
-        // SurfaceTexture wurde aktualisiert
-        // Hier können entsprechende Aktionen ausgeführt werden, wenn gewünscht
-    }
-
-    private SurfaceTexture getSurfaceTexture() {
-        return textureView.getSurfaceTexture();
-    }
-
-    @Override
-    public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
-        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
-        if (requestCode == REQUEST_PERMISSION) {
-            if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
-                // Berechtigungen wurden gewährt
-                Toast.makeText(this, "Berechtigungen gewährt", Toast.LENGTH_SHORT).show();
-                isRecording = true;
-                alarmRecorder.startRecording();
-            } else {
-                // Berechtigungen wurden nicht gewährt
-                Toast.makeText(this, "Berechtigungen nicht gewährt", Toast.LENGTH_SHORT).show();
-            }
-        }
-    }
 }

app/src/main/java/com/example/greenwatch/Mikrofon.java

@@ -0,0 +1,254 @@
+package com.example.greenwatch;
+
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.core.app.ActivityCompat;
+import androidx.core.content.ContextCompat;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
+import android.media.AudioFormat;
+import android.media.AudioRecord;
+import android.media.MediaRecorder;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.widget.TextView;
+
+import java.text.SimpleDateFormat;
+import java.util.Date;
+
+public class Mikrofon extends AppCompatActivity {
+
+    private AufnahmeTask aufnahmeTask;
+    private TextView textViewMaxAmp;
+    private TextView textViewMaxAmpdb;
+    private TextView textViewZeitstempel;
+    private static final int RECHTEANFORDERUNG_MIKROFON = 1;
+
+    private boolean detection_mic = false;
+    private String zeit = "0";
+    private boolean kalibrierung_do = true;
+    private float threshold = 40;
+    private float sensitivity = 5;
+    private final static String KEY_WERT = "KEY_WERT_" + Mikrofon.class.getSimpleName();
+    private final static String KEY_KALIBRIERUNG = "KEY_KALIBRIERUNG_" + Mikrofon.class.getSimpleName();
+
+
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_mikrofon);
+        textViewMaxAmp = (TextView) findViewById(R.id.textViewMaxAmp);
+        textViewMaxAmpdb = (TextView) findViewById(R.id.textViewMaxAmpdb);
+        textViewZeitstempel = (TextView) findViewById(R.id.textViewZeitstempel);
+        //kalibrierung_do = true;
+
+
+    }
+
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        SharedPreferences p = getPreferences(Context.MODE_PRIVATE);
+        threshold = p.getFloat(KEY_WERT, 40);
+        kalibrierung_do = p.getBoolean(KEY_KALIBRIERUNG, true);
+
+        if (!istZugriffAufMikrofonErlaubt()) {
+            zugriffAufMikrofonAnfordern();
+        }
+        if (istZugriffAufMikrofonErlaubt()) {
+            aufnahmeTask = new AufnahmeTask();
+            aufnahmeTask.execute();
+        }
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        SharedPreferences p = getPreferences(Context.MODE_PRIVATE);
+        SharedPreferences.Editor editor = p.edit();
+        editor.putFloat(KEY_WERT, threshold);
+        if(isFinishing()==true){
+            editor.putBoolean(KEY_KALIBRIERUNG, true);
+        }else {
+            editor.putBoolean(KEY_KALIBRIERUNG, false);
+        }
+        editor.commit();
+        if(aufnahmeTask!=null) {
+            aufnahmeTask.cancel(true);
+            aufnahmeTask = null;
+        }
+    }
+
+    private boolean istZugriffAufMikrofonErlaubt() {
+        if (ContextCompat.checkSelfPermission(this, android.Manifest.permission.RECORD_AUDIO) != PackageManager.PERMISSION_GRANTED) {
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    private void zugriffAufMikrofonAnfordern() {
+        ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.RECORD_AUDIO}, RECHTEANFORDERUNG_MIKROFON);
+    }
+
+    public static String Zeitpunkt(){
+        Long tslong = System.currentTimeMillis();
+        SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
+        Date date = new Date(tslong);
+        String resultdate = sdf.format(date);
+
+        return resultdate;
+    }
+
+
+    class AufnahmeTask extends AsyncTask<Long, Verarbeitungsergebnis, Void> {
+        private AudioRecord recorder;
+        private final int sampleRateInHz = 44100;
+        private final int channelConfig = AudioFormat.CHANNEL_IN_MONO;
+        private final int audioFormat = AudioFormat.ENCODING_PCM_16BIT;
+        private int minPufferGroesseInBytes;
+        private int pufferGroesseInBytes;
+        private RingPuffer ringPuffer = new RingPuffer(10);
+        private boolean erlaubt_rise = true;
+        private boolean erlaubt_fall = true;
+
+        AufnahmeTask() {
+            minPufferGroesseInBytes = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);
+            pufferGroesseInBytes = minPufferGroesseInBytes * 2;
+            recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, sampleRateInHz, channelConfig, audioFormat, pufferGroesseInBytes);
+        }
+        //hi
+        public float kalibrieren(short[] puffer){
+            try {
+                Thread.sleep(3000);
+
+            } catch (InterruptedException e) {
+                e.printStackTrace();
+            }
+            int anzahlIterationen = 100;
+            float sum = 0;
+            for(int i = 0; i < anzahlIterationen; i++){
+                int z = recorder.read(puffer, 0, puffer.length);
+                Verarbeitungsergebnis kalibrierung = verarbeiten(puffer, z);
+                sum += (float) kalibrierung.db;
+                System.out.println("Aktueller_Wert Kalibrierung" +kalibrierung.db);
+            }
+            System.out.println("Summe:"+sum);
+            return sum/anzahlIterationen;
+        }
+
+        public void Detektion(Verarbeitungsergebnis ergebnis){
+            if(ergebnis.db >= (threshold+sensitivity)){
+                detection_mic = true;
+                erlaubt_fall = true;
+                while(erlaubt_rise){
+                    erlaubt_rise = false;
+                    zeit = Zeitpunkt() + " - " + ergebnis.db + " - " + (threshold+sensitivity); //Überschreiben des Zeitpunkts beim Erkennen der Detektion
+                    //nur zum Testen in zeit noch ergebnis.db und threshold ausgegeben -> muss am Ende nur Zeitpunkt() rein, Rest weg
+                }
+            } else if (ergebnis.db <= (threshold)) {
+                detection_mic = false;
+                erlaubt_rise = true;
+                while(erlaubt_fall){
+                    erlaubt_fall = false;
+                    zeit = Zeitpunkt(); //erneutes Überschreiben des Zeitpunkts beim Verschwinden der Detektion
+                }
+            }
+        }
+        @Override
+        protected Void doInBackground(Long... params) {
+
+            recorder.startRecording();
+            short[] puffer = new short[pufferGroesseInBytes / 2];
+            GleitenderMittelwert gleitenderMittelwertdB = new GleitenderMittelwert(0.2f);
+            float db = 0;
+
+
+            //kalibrierung
+            if(kalibrierung_do){
+                threshold = kalibrieren(puffer);
+                kalibrierung_do = false;
+            }
+
+
+            for (; ; ) {
+                if (isCancelled()) {
+                    break;
+                } else {
+                    //ergebnis ermitteln
+                    int n = recorder.read(puffer, 0, puffer.length);
+                    Verarbeitungsergebnis ergebnis = verarbeiten(puffer, n);
+
+                    //Mittelwertberechnnung
+                    db = (float) ergebnis.db;
+                    db = gleitenderMittelwertdB.mittel(db);
+                    ergebnis.db = (int) db;
+
+                    //Db Wert mit Schwellwert vergleichen und Warnung setzen
+                    Detektion(ergebnis);
+                    publishProgress(ergebnis);
+
+                    try {
+                        Thread.sleep(10);
+                    } catch (InterruptedException e) {
+                        e.printStackTrace();
+                    }
+                }
+            }
+            recorder.release();
+            return null;
+        }
+
+        private Verarbeitungsergebnis verarbeiten(short[] daten, int n) {
+            String status;
+            short maxAmp = -1;
+            int db = 0, db_wert = 0;
+
+            if (n == AudioRecord.ERROR_INVALID_OPERATION) {
+                status = "ERROR_INVALID_OPERATION";
+            } else if (n == AudioRecord.ERROR_BAD_VALUE) {
+                status = "ERROR_BAD_VALUE";
+            } else {
+                status = "OK";
+                short max = 0;
+                for (int i = 0; i < n; i++) {
+                    if (daten[i] > max) {
+                        max = daten[i];
+                    }
+                }
+                ringPuffer.hinzufuegen(max);
+                maxAmp = ringPuffer.maximum();
+            }
+            //Umwandlung Amplitudenwert in dB
+            db_wert = (int) (20*Math.log10(maxAmp));
+            if (db_wert > 0){
+                db = db_wert;
+            }
+
+
+            return new Verarbeitungsergebnis(status, maxAmp, db);
+        }
+
+        /////////////////////////////////////////////
+        @Override
+        protected void onProgressUpdate(Verarbeitungsergebnis... progress) {
+            super.onProgressUpdate(progress);
+
+
+            System.out.println(detection_mic);
+            System.out.println(zeit);
+            textViewZeitstempel.setText(zeit);
+
+            textViewMaxAmpdb.setText("" + progress[0].db);
+            textViewMaxAmp.setText("" + progress[0].maxAmp);
+
+        }
+    }
+    /////////////////////////////////////////////
+
+}

app/src/main/java/com/example/greenwatch/RingPuffer.java

@@ -0,0 +1,63 @@
+package com.example.greenwatch;
+
+public class RingPuffer {
+
+    private short[] puffer;
+    private final int laenge;
+    private int anzahlEnthaltenerDaten;
+    private int position;
+
+
+    public RingPuffer(int n) {
+        laenge = n;
+        anzahlEnthaltenerDaten = 0;
+        position = 0;
+        puffer = new short[laenge];
+    }
+
+    public void hinzufuegen(short wert) {
+        puffer[position] = wert;
+        position++;
+        if (position >= laenge) {
+            position = 0;
+        }
+        if (anzahlEnthaltenerDaten < laenge) {
+            anzahlEnthaltenerDaten++;
+        }
+    }
+
+        /*public void hinzufuegen(short[] daten) {
+            for (short d : daten) {
+                puffer[position] = d;
+                position++;
+                if (position >= laenge) {
+                    position = 0;
+                }
+            }
+            if (anzahlEnthaltenerDaten < laenge) {
+                anzahlEnthaltenerDaten += daten.length;
+                if (anzahlEnthaltenerDaten >= laenge) {
+                    anzahlEnthaltenerDaten = laenge;
+                }
+            }
+        }*/
+
+    public short maximum() {
+        short max = 0;
+        for (int i = 0; i < anzahlEnthaltenerDaten; i++) {
+            if (puffer[i] > max) {
+                max = puffer[i];
+            }
+        }
+        return max;
+    }
+
+       /* public float mittelwert() {
+            float summe = 0;
+            for (int i = 0; i < anzahlEnthaltenerDaten; i++) {
+                summe += puffer[i];
+            }
+            return summe / anzahlEnthaltenerDaten;
+        }*/
+}
+

app/src/main/java/com/example/greenwatch/Verarbeitungsergebnis.java

@@ -0,0 +1,13 @@
+package com.example.greenwatch;
+
+public class Verarbeitungsergebnis {
+    String status;
+    short maxAmp;
+    int db;
+//
+    Verarbeitungsergebnis(String status, short maxAmp, int db) {
+        this.status = status;
+        this.maxAmp = maxAmp;
+        this.db = db;
+    }
+}

app/src/main/java/com/example/greenwatch/VideoRecorder.java

@@ -1,39 +0,0 @@
-package com.example.greenwatch;
-
-import android.media.MediaRecorder;
-import android.view.Surface;
-import android.view.SurfaceHolder;
-
-import java.io.IOException;
-
-public class VideoRecorder implements Runnable{
-    private final MediaRecorder videoRecorder;
-    private final String videoPath;
-    //private SurfaceHolder previewHolder;
-    private Surface surface;
-
-
-    public VideoRecorder(MediaRecorder videoRecorder, String videoPath, Surface surface) {
-        this.videoRecorder = videoRecorder;
-        this.videoPath = videoPath;
-        this.surface = surface;
-    }
-    @Override
-    public void run() {
-        videoRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);
-        videoRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);
-        videoRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.DEFAULT);
-        videoRecorder.setOutputFile(videoPath);
-        videoRecorder.setOrientationHint(90);
-        videoRecorder.setPreviewDisplay(surface);
-
-        try {
-            videoRecorder.prepare();
-            videoRecorder.start();
-
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
-    }
-}
-

app/src/main/res/layout/activity_main.xml

@@ -6,26 +6,13 @@
     android:layout_height="match_parent"
     tools:context=".MainActivity">
 
-    <TextureView
-        android:id="@+id/textureView"
-        android:layout_width="1sp"
-        android:layout_height="1sp"
-        android:visibility="visible"
-        app:layout_constraintBottom_toBottomOf="parent"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="1.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/button"
-        app:layout_constraintVertical_bias="0.0" />
-
     <Button
-        android:id="@+id/button"
+        android:id="@+id/buttonstartmicdetection"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginEnd="339dp"
-        android:text="Record Video"
-        app:layout_constraintHorizontal_bias="0.5"
+        android:text="Starte Mikrofon Detection"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toTopOf="parent"/>
-
+        app:layout_constraintTop_toTopOf="parent" />
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/layout/activity_mikrofon.xml

@@ -0,0 +1,78 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:paddingBottom="16dp"
+    android:paddingLeft="16dp"
+    android:paddingRight="16dp"
+    android:paddingTop="16dp"
+    tools:activity="com.example.greenwatch">
+
+
+
+
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="max. Amp: "
+        android:id="@+id/labelMaxAmp"
+        android:layout_alignParentTop="true"
+        android:layout_alignParentStart="true"/>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/textViewMaxAmp"
+        android:text=" "
+        android:layout_alignBaseline="@+id/labelMaxAmp"
+        android:layout_toEndOf="@+id/labelMaxAmpdb"/>
+
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="max. Amp in dB: "
+        android:id="@+id/labelMaxAmpdb"
+        android:layout_below="@+id/labelMaxAmp"
+        android:layout_alignParentStart="true"/>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/textViewMaxAmpdb"
+        android:text=" "
+        android:layout_alignBaseline="@+id/labelMaxAmpdb"
+        android:layout_toEndOf="@+id/labelMaxAmpdb"/>
+
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:text="Meldung: "
+        android:id="@+id/labelZeitstempel"
+        android:layout_below="@+id/labelMaxAmpdb"
+        android:layout_alignParentStart="true"/>
+    <TextView
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:id="@+id/textViewZeitstempel"
+        android:text=" "
+        android:layout_alignBaseline="@+id/labelZeitstempel"
+        android:layout_toEndOf="@+id/labelMaxAmpdb"/>
+
+
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:id="@+id/scrollView3"
+        android:layout_below="@+id/labelMaxAmpdb"
+        android:layout_alignParentStart="true">
+
+        <TextView
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:id="@+id/textViewLogger"/>
+    </ScrollView>
+
+</RelativeLayout>